Key to the species of the genus Luteostriata

1 Dorsal surface with seven longitudinal stripes...................................................... L. abundans

- Dorsal surface with less than seven longitudinal stripes....................................................... 2

2 Dorsum with one conspicuous black median stripe, sometimes with two lighter lateral stripes................. L. muelleri

- Other pattern of stripes................................................................................. 3

3 Dorsum with two lateral stripes and three thin inconspicuous stripes, median and paramarginal, usually not visible to the naked eye.......................................................................................... L. subtilis

- Dorsal surface with more than three noticeable longitudinal stripes.............................................. 4

4 Dorsum with two lateral bands with inner and outer dark margins and very thin inconspicuous median stripe....... L. arturi

- Dorsum with five conspicuous longitudinal stripes........................................................... 5

5 Dorsal median stripe only visible in the first half of the body............................................... L. fita

- Dorsal median stripe visible along the whole body........................................................... 6

6 Globose prostatic vesicle......................................................................... L. ernesti

- Elongated prostatic vesicle.............................................................................. 7

7 Branched sperm ducts opening separately into the prostatic vesicle....................................... L. ceciliae

- Unbranched sperm ducts............................................................................... 8

8 Highly folded prostatic vesicle................................................................... L. caissara

- Straight, not folded, prostatic vesicle...................................................................... 9

9 Lateral stripes on dorsal surface are the widest, gold-yellow color.......................................... L. graffi

- All dorsal stripes with about the same width, light-yellow color.................................... L. pseudoceciliae